contrary to the long period ground motions that can be predicted and estimated, high frequency ground motions have random character and behave stochastically. stochastic modeling methods are usually used for the modeling of high frequency ground motions where there are not strong ground motion records. stochastic methods are of two kinds: in the first one, the seismic source is considered as a ...

Transformer fault diagnosis and repair is a complex task that includes many possible types of faults and demands special trained personnel. In this paper, Petri Nets are used for the simulation of transformer fault diagnosis process and the definition of the actions followed to repair the transformer. An oil thermometer and a Buchholz relay are used for transformer fault detection. Simulation r...

During fault simulation, an approximation frequently used in practice is to declare a fault to be detected after it has been potentially detected a predetermined number of times. This approximation may lead to declaring a fault detected when in fact the fault will not be detected during a standard test application process. We propose an alternative measure of fault detection for potentially det...

Fault injection techniques are important and widely used for verifying the dependability of computer systems. Traditionally fault injection has been successfully applied for evaluating dependability of hardware electronics and is now increasingly been used for software systems. At the same time increasing complexity of embedded software systems such as in automotive sector has driven these doma...

Abstract — A diagnostic automatic test pattern generation (DATPG) system is constructed by adding new algorithmic capabilities to conventional ATPG and fault simulation programs. The system generates tests to distinguish between fault pairs through different output responses. Given a fault pair, by modifying circuit netlist a new single fault is modeled and targeted for detection by a conventio...

This article discusses an approach for hierarchical multilevel fault simulation for large systems described at the transistor, gate, and higher levels. The approach reduces the memory requirement of the simulation drastically, thus allowing the simulation of circuits that are too large to simulate at one flat level on typical engineering workstations. This is achieved by exploiting the regulari...

Condition monitoring and protection methods based on the analysis of the machine's current are widely used according to non-invasive characteristics of current transformers. It should be noted that, these sensors are installed by default in the machine control center. On the other hand, condition monitoring based on mathematical methods has been proposed in literature. However, they are model b...

Over a decades, although various techniques have been proposed to improve the training of a neural network to against node fault, there is still a lacking of (i) a simple objective function to formalize multiple nodes fault and not much work has been done on understanding of the relation between fault tolerant and generalization. In this paper, an objective function based on the idea of Kullbac...

A method for single hard fault detection in linear analog circuits based on simulation before testing approach is proposed in this paper. Simulation before testing approach locates or identifies faulty components of the circuit under test (CUT) by creating a fault dictionary for all the potentially faulty components from the simulation of CUT. In the proposed approach, the CUT is simulated usin...